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Lee said the contouring is for "a slimmer and graceful looking neck for updos."

"For everyday use, adding just a line of white will automatically and naturally make your neck look slimmer," Lee said in a separate YouTube tutorial. "For pictures, you'll want to add a dark line next to it."

Skip to about 6:34 in the video below for more details on how to apply this trend.

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools